honojs hono up to 4.12.3 url encoding

CVSS Meta Temp Score
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CTI Interest Score
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7.5$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in honojs hono up to 4.12.3. This affects an unknown function. The manipulation leads to url encoding. This vulnerability is documented as CVE-2026-29045. The attack can be initiated remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in honojs hono up to 4.12.3. This issue affects some unknown processing. The manipulation with an unknown input leads to a url encoding vulnerability. Using CWE to declare the problem leads to CWE-177. The product does not properly handle when all or part of an input has been URL encoded. Impacted is confidentiality. The summary by CVE is:

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to version 4.12.4, when using serveStatic together with route-based middleware protections (e.g. app.use('/admin/*', ...)), inconsistent URL decoding allowed protected static resources to be accessed without authorization. The router used decodeURI, while serveStatic used decodeURIComponent. This mismatch allowed paths containing encoded slashes (%2F) to bypass middleware protections while still resolving to the intended filesystem path. This issue has been patched in version 4.12.4.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-29045 since 03/03/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 4.12.4 eliminates this vulnerability. Applying the patch 6a0607a929d888893f0c91d92dce2fcfdb3662a3 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.5

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔒

CNA Base Score: 7.5
CNA Vector (GitHub_M): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Url encoding
CWE: CWE-177 / CWE-172
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: hono 4.12.4
Patch: 6a0607a929d888893f0c91d92dce2fcfdb3662a3

Timelineinfo

03/03/2026 CVE reserved
03/05/2026 +2 days Advisory disclosed
03/05/2026 +0 days VulDB entry created
03/06/2026 +1 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-q5qw-h33p-qvwr
Status: Confirmed

CVE: CVE-2026-29045 (🔒)
GCVE (CVE): GCVE-0-2026-29045
GCVE (VulDB): GCVE-100-348851

Entryinfo

Created: 03/05/2026 02:43
Updated: 03/06/2026 23:22
Changes: 03/05/2026 02:43 (65), 03/06/2026 23:22 (11)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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